<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>

    <script src="../js/jQuery.js"></script>

    <style>
        div{
            width: 100px;
            height: 100px;
            background-color: blue;
        }
    </style>
</head>
<body>

    <div>hahha</div>


    <script>
        // let div=document.querySelector("div");
        // $(div).hide();
        // $("div")[0].style.display="none";
        $(function(){
            $("div").on("click",function(){
                alert("hello")
            })
            $("div").trigger("click");
            
})




    </script>

    
</body>
</html>